I can think of many cases ________ they had been suffering from cancer.(Unit7-7)

I can think of many cases ________ they had been suffering from cancer.(Unit7-7)
A.that?B.why?C.which?D.what
为什么选A不选B?请分析一下句型或语法.
英语人气:422 ℃时间:2019-11-05 04:52:35
优质解答
case是情况的意思,不能用why.搭配不当
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